/*
 * Copyright (c) 2023 unknowIfGuestInDream
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *     * Redistributions of source code must retain the above copyright
 * notice, this list of conditions and the following disclaimer.
 *     * Redistributions in binary form must reproduce the above copyright
 * notice, this list of conditions and the following disclaimer in the
 * documentation and/or other materials provided with the distribution.
 *     * Neither the name of unknowIfGuestInDream, any associated website, nor the
 * names of its contributors may be used to endorse or promote products
 * derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED. IN NO EVENT SHALL UNKNOWIFGUESTINDREAM BE LIABLE FOR ANY
 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

package com.tlcsdm.core.javafx.richtext.hyperlink;

import org.fxmisc.richtext.model.SegmentOpsBase;

import java.util.Optional;

/**
 * @author unknowIfGuestInDream
 */
public class HyperlinkOps<S> extends SegmentOpsBase<Hyperlink, S> {

    public HyperlinkOps() {
        super(new Hyperlink("", "", ""));
    }

    @Override
    public int length(Hyperlink hyperlink) {
        return hyperlink.length();
    }

    @Override
    public char realCharAt(Hyperlink hyperlink, int index) {
        return hyperlink.charAt(index);
    }

    @Override
    public String realGetText(Hyperlink hyperlink) {
        return hyperlink.getDisplayedText();
    }

    @Override
    public Hyperlink realSubSequence(Hyperlink hyperlink, int start, int end) {
        return hyperlink.subSequence(start, end);
    }

    @Override
    public Hyperlink realSubSequence(Hyperlink hyperlink, int start) {
        return hyperlink.subSequence(start);
    }

    @Override
    public Optional<Hyperlink> joinSeg(Hyperlink currentSeg, Hyperlink nextSeg) {
        if (currentSeg.isEmpty()) {
            if (nextSeg.isEmpty()) {
                return Optional.empty();
            } else {
                return Optional.of(nextSeg);
            }
        } else {
            if (nextSeg.isEmpty()) {
                return Optional.of(currentSeg);
            } else {
                return concatHyperlinks(currentSeg, nextSeg);
            }
        }
    }

    private Optional<Hyperlink> concatHyperlinks(Hyperlink leftSeg, Hyperlink rightSeg) {
        if (!leftSeg.shareSameAncestor(rightSeg)) {
            return Optional.empty();
        }

        String leftText = leftSeg.getDisplayedText();
        String rightText = rightSeg.getDisplayedText();

        return Optional.of(leftSeg.mapDisplayedText(leftText + rightText));
    }

}
